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1.How did plants contribute to the first mass extinction event? Please answer in detail. 2.Take a look...

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Biology

1.How did plants contribute to the first mass extinction event?Please answer in detail.

2.Take a look at the Revive and Restore project. What are twoanimals they are attempting to bring back? How? Will these beidentical to the original? Is this project worth doing?

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1 An extinction event mass extinction or biotic crisis is a widespread and rapid decrease in the biodiversity on Earth Such an event is identified by a sharp change in the diversity and abundance of multicellular organisms It occurs when the rate of extinction increases with respect to the rate of speciation In the plant kingdom mass extinction events can be seen as opportunities for turnover leading to renewed biodiversity Some important plant groups such as the gymnosperms including pines spruce and firs lost a great deal of their diversity through extinction On the other hand flowering plants angiosperms did not suffer from increased extinction and shortly after the impact they underwent a new rapid increase in their diversity These evolutionary dynamics contributed to make flowering plants dominate todays global diversity above all other plant groups Fossils of microscopic spores indicate that simple plants perhaps similar to mosses and liverworts of today first arrived on land roughly 470 million years ago This happened relatively recently compared to another Earth shaping event perpetrated by tiny microorganisms that share plants ability to photosynthesize or use sunlight to produce sugar About 2 billion years earlier cyanobacteria also called blue green algae are believed to have begun pumping oxygen into our atmosphere as a byproduct of photosynthesis At roughly this time perhaps a little later the planet cooled glaciers spread and sea levels dropped The result was the    See Answer
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